Wiitigo 
Creature — Yeti
This creature enters with six +1/+1 counters on it. At the beginning of your upkeep, put a +1/+1 counter on this creature if it has blocked or been blocked since your last upkeep. Otherwise, remove a +1/+1 counter from it.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL